THE BASIC PRINCIPLES OF ER:YB:YAB CRYSTAL

The nonradiative changeover rates Keep to the formulation WNR = W (0) exp(-alphap), in which p is the volume of phonons matching the Vitality hole. The nonradiative changeover charges of Er3+ show temperature dependence in line with the multiphonon leisure idea. In Tm3+ the temperature dependence of nonradiative relaxation charges is sophisticated